Designed to be used together with the Buon Vino Super Jet Filter (WFG007) this Pre-Screen Filter will ensure that your Super Jet Filter runs well for much longer. This filter is designed to catch large particulates such as oak chips, vine pieces, leaves, and grape skins that could damage your pump if they entered the motor area by burning it out (and voiding the warranty). Pre-Screen filters are a cost effective way to protect your investment while producing the most premium homemade wine possible.